Zach Gorelick of the Washington Free Beacon exposes an interesting development involving a union that has devoted much of its attention to criticizing WalMart.

A major anti-Walmart union is staying tight-lipped about billionaire Walmart heiress Alice Walton’s six-figure donation to Hillary Clinton.

The United Food and Commercial Workers Union endorsed Clinton in January, less than one month after Walton contributed more than $353,000 to a pro-Hillary fund.

International president of the UFCW Marc Perrone wrote in a statement, “It is our members’ strong belief that Hillary Clinton is not just the strongest presidential candidate, but the right one.”

The union has sparred for decades with Walmart, going so far as to create the ‘Making Change at Walmart’ union group, which represents Walmart workers and frequently tangles with the company in the courts and federal labor system. The website ‘Walmart 1 Percent,’ a project of ‘Making Change at Walmart,’ features Alice Walton on its “family” page, which draws attention to the wealth of the Walton family.

“The Waltons make billions a year off of a company most of them don’t even work for,” the group writes, “while Walmart associates struggle for respect on the job and enough pay to make ends meet.”

Clinton served as the only female member of the Walmart Board of Directors from 1986 to 1992, and was at Walmart during a major campaign by the world’s largest retailer to defeat labor unions representing its employees.